États-Unis
Montre maintenant: États-Unis - Timbres-Poste (1847 - 2024) - 1 Timbres-poste.
1973
Progress in Electronics
10. juillet WM: Aucun Perforation: 11
![[Progress in Electronics, type AJG]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/AJG-s.jpg)
![[Progress in Electronics, type AJH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/AJH-s.jpg)
![[Progress in Electronics, type AJI]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Postage-stamps/AJI-s.jpg)
| No. | Genre | D | Couleur | Description |
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| 1273 | AJG | 6C | multicouleurs | O | (53 mill) | 0,27 | - | 0,27 | 0,81 | USD |
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| 1274 | AJH | 8C | multicouleurs | (160 mill) | 0,27 | - | 0,27 | 0,81 | USD |
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| 1274Er | Black omitted | 647 | - | - | - | USD | |||||||||||
| 1274Er2 | Tan and lilac omitted | 1 618 | - | - | - | USD | |||||||||||
| 1275 | AJI | 15C | multicouleurs | (39 mill) | 0,27 | - | 0,27 | 0,81 | USD |
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| 1275Er | Black omitted | 1 618 | - | - | - | USD |
